The back-up rings are generally combined with primary seals (or O'Rings) and are used to help the O'Rings resist the effects of extrusion. A back-up ring is required for increased pressures or significant extrusion gaps in the system. Several types of back-up rings are available - concave, single spire, double spire - cut or uncut - in rubber, PTFE, POM and PA, among others.
The BECA 008 profile is an uncut back-up ring with a concave shape that allows it to fit snugly against the O'Ring. The ring is systematically assembled in tandem with an O'Ring and an X'Ring.
The BECA 011 Piston profile is a back-up ring cut at 30° with a rectangular profile. The ring is systematically assembled in tandem with an O'Ring or an X'Ring. An uncut version of this profile can be made.
BECA 012 Piston
The BECA 012 Piston profile is a spiral back-up ring with a rectangular profile. The ring is systematically assembled in tandem with an O'Ring or an X'Ring. An uncut version of this profile can be made.
BECA 012 Rod
The BECA 012 Rod profile is a spiral back-up ring with a rectangular profile. The ring is systematically assembled in tandem with an O'Ring or an X'Ring. An uncut version of this profile can be made.